The two included exhaust tubes are 21⁄2-inch-diameter 304 stainless steel, and you can see where it attaches in front of the oil pan, feeds into the turbo, and where it attaches back into your factory exhaust. It took us about 30 minutes to get this all bolted up to the test engine. Obviously it will take longer in a Jeep, but that time speaks well of how easy a full install should be.